"Pull-ups" is a very important training project in the army, and it is a kind of training to enhance the physique and combat effectiveness of junior officers and men. In the process of training, everyone will hone themselves under the pressure of strict discipline and make this team more United and cohesive. If this team had only seven points of fighting capacity, it would have become a tenacious and very effective team in training. This is the purpose of regular military training.
To put it simply, zipper is a kind of harsh training, that is, walking for dozens of kilometers with heavy load, and sometimes living outside, climbing mountains and mountains.
Nowadays, many places generally refer to training on foot, or teams playing games abroad to warm up, strengthen training and find out their own shortcomings, so as to better strengthen their abilities.